Affinities of Earths: 15 



Heoce the affinities of thefe Earths, and 

 calces of iron to each other, feem to me to 

 Hand in the following order. 



Lime) Magncficty j4rg\llf Sihx t . Calx of Ira:* 



Calr of Iron, Lime, Calx of Iron, Calx of Iron, Lime, 



Argill, Calx of Iron, Lime, Lime, ArgiH, 



Magnet, Silex, Argil, Silex, 



Silex, Magnefia. 



When fubftances are diffolved and at liberty, 

 their affinities whether in the moift or dry 

 way, are exactly the fame, they being equally 

 divided ; and the only difference is, that in 

 one cafe, they are diflblved by lire, in the 

 other by a liquid. We may alfo obferve, ift, 

 that the lefs calces of iron are dephlogifticated, 

 the greater is their power of attracting Earths 

 as Mr. Rinman has difcovered, and when 

 dephlogifticated to a certain degree, they lofe 

 this power, their colour according to the 

 degree of their dephlogiftication is as follows, 

 whitifh, pale yellow, yellow, ted, brown, 

 green, and blue. adly. That when once 

 lime or calces of iron have ated as menftru- 

 urns upon any Earth, a compound menftruum 

 arifes, which ads much more powerfully on 

 other Earths; thus, though one hundred parts 

 of lime can diflblve or liquify very little of 

 filex, yet when thefe hundred parts of lime 

 have taken up fifty of magnefia, they are 

 enabled to diijblve one hundred of filex, and 



this 



